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Frame size question..(13 posts)

Frame size question..Sawman
Nov 30, 2001 2:57 PM
I have been mountain biking for a long time but also like road riding but am tired of doing it on my road bike. I am buying a 2001 Bianchi Campione on the net and am not sure of the correct size. I am 5'7" with a 29" inseam. I am considering a 51 or a 53cm. Any input is greatly appreciated.

Thanks,
Dave
re: might wanna check that measurment.Akirasho
Nov 30, 2001 3:15 PM
... sounds a little shortish...

Are you getting an accurate cyclist's inseam measurment?
this is not the same as a tailor's.

http://www.coloradocyclist.com/BikeFit/index.cfm
http://www.kleinbikes.com/tech_guide/fit2.asp
http://www.sheldonbrown.com/frame-sizing.html
http://www.rivendellbicycles.com/frameinfo/Frame_Sizing.htm

We abide.

Remain In Light.
re: might wanna check that measurment.jkh
Nov 30, 2001 3:30 PM
I am 5'8" with 30" inseam and I ride comfortably with 50cm c-t-c. I've tried 52 ~ 54 cm before and they were just too big to be comfortable.

You may want to go with 50cm or even smaller, and with 170mm crank.
too small....C-40
Dec 1, 2001 8:50 AM
A 5'-7" rider will generally find the top tube too short on a 50cm, even measured c-c. This poster should look to buy the largest (and longest TT) frame that he can straddle to get 2cm of standover clearance in bare feet.

I'm 5'-7" (almost), with a 32-5/8" inseam. I ride a 55cm (c-t) with a 110 stem. If I were to ride a 50cm, I'd need a 130 or 140 stem, even with my shorter torso.
too small....jkh
Dec 1, 2001 11:57 PM
But considering that his inseam is only 29" (and mine is 30"), there is no way that he could ride a frame larger than 54cm c-c. For him (as well as myself) a 2cm standover clearance can only be achieved on a 48~50cm frame.

Yes, you are right that a longer stem is needed. I need a 12cm stem. For the poster, if he rides a 50cm frame, he may need a 11~12cm stem.

I may be more conserative. If I cannot be perfectly fit on a bike, and I don't want go for a custom one, I rather have a smaller frame than a larger one.
too small....Sawman
Dec 2, 2001 4:26 PM
Hey, I was measuring my inseam incorrectly. 29" is my tailor inseam. My cycling inseam is 31.5 and that puts me on a 53cm frame according to the size computations on wrenchscience.com page. I also went to my LBS and rode a 51 and 53. The 51 was just too short of a top tube, felt more comfortable on the 53. Thanks for everyones help. I'll post a followup after I put some miles on the frame.
re: Frame size question..CT1
Nov 30, 2001 4:55 PM
If your measurements are correct I'd suggest starting with a 52-53cm CT frame. Make sure you don't get a too small frameset as the saddle to bar drop may become problematic. I think the 51cm CT would be too small. I.e. ideally, you want a frame with 1cm or less of spacers under your threadless stem. If you size the frame by this criteria and a comfy TT length you should be "good-to-go".

good luck
JohnG
JohnG .....in Delaware??Sawman
Nov 30, 2001 6:09 PM
JohnG: You wouldn't happen to be the JohnG from Dover would ya?

Dave
nope, SoCal .... ride on ....... nmCT1
Nov 30, 2001 7:28 PM
nope, SoCal .... ride on ....... nmSawman
Nov 30, 2001 7:46 PM
Sorry. Thanks for the advice. Enjoy that great SoCal weather.....
It's been BA cold lately in SoCal.....CT1
Nov 30, 2001 9:41 PM
It will probably be low 40 degees when I leave the house at 7:30a tomorrow morning for my club ride. Maybe that isn't cold by most peoples standards but it aint "great" either .... hahaha.

ride on
JohnG
warm in De...Sawman
Nov 30, 2001 10:35 PM
Was 73 today and 65 tomorrow, who says SoCal has all the nice winter weather..... Although I dont think it's going to hold out much longer....
re: Frame size question..Tim Medina
Dec 1, 2001 7:49 PM
Go check out ( www.wrenchscience.com ) for a great online size tool. It will recomend the ideal frame size, overall reach and handle bar width.